v0.8.18

Linked-device history no longer queues hundreds of bootstrap messages ahead of live conversations. Catch-up transfers bounded encrypted chunks through the existing file service, imports recent history first, and continues older pages in the background. Live sends and replies have independent delivery.

• Resume interrupted archives and recover missing roster proof without recreating messages or rerunning old tasks.
• Keep imported history in the background when another device forwards it; recover the browser's sending window after a lost receipt or restart.
• Preserve queued history, original identities, signatures, membership checks and encryption. No reset or relinking is required.
• Use indexed pending-work queries, skip expensive idle worker queries, and show stored history separately from completed import.

The release includes the desktop installers and CLI/server binaries. Installers are unsigned; verify downloads against SHA256SUMS. Clients update through their existing updater. The native Android preview is distributed separately.

Synthetic relay, browser, three-device and native tests do not establish timings on a physical phone; actual phone startup and catch-up performance remain to be measured.